The top comment on /r/ethereum agrees with you on it not being a typo: https://www.reddit.com/r/ethereum/comments/4onbkj/deconstructing_thedao_attack_a_brief_co

The top comment on /r/ethereum agrees with you on it not being a typo: https://www.reddit.com/r/ethereum/comments/4onbkj/deconstructing_thedao_attack_a_brief_code_tour/ https://www.reddit.com/r/ethereum/comments/4onbkj/deconstruc... . Hopefully in a few days we will have an authoritative explanation. Otherwise this might become a HN urban legend.